Abstract

It is shown that measurements of quantum variables can be understood on the basis of the time-dependent Schroedinger equation, without assuming any “jump” os “reduction of wave packets”. The reduction of the wave packets is admissible and giver correct results, but it is not necessary.

Highlights

  • Quantum Mechanics represents one of the greatest triumphs of the scientific enterprise of the twentieth century

  • From among the various explanations that seek a resolution to the conceptual problems of quantum mechanics, we focus on the ‘environment induced decoherence theory’ - an approach that employs the methods developed by several authors to analyse the quantum mechanics of Measurements in QuantWuilml-be-Msete-bcy-hINa-TnECicHs a system in interaction with its environment(Zeh, 1970)

  • The strength of the theory has been often claimed to be the fact that it is within the realm of quantum mechanics, and uses the rules of quantum theory to explain the emergence of classicality

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Summary

Introduction

Quantum Mechanics represents one of the greatest triumphs of the scientific enterprise of the twentieth century. We will discuss attempts to understand and explain away the underlying paradoxes in quantum theory as highlighted in the quantum measurement problem and the question of the quantum-classical connection. The central idea of this approach is that classicality is an emergent property triggered in open systems by their environments and it is the influence of environmental interactions that explains the perceived outcomes of quantum measurements(Zurek, 1981) We illustrate this approach through some specific system-apparatus models and highlight some key results of other researchers and ours. In the light of several advances in technology and high precision experiments, many of the questions relating to the conceptual problems of quantum mechanics are no longer merely ’academic’ in nature These questions and theories like environment-induced decoherence offer themselves to experimental tests. In the concluding section of this chapter we summarize the main ideas that are presented in it and highlight some of the difficulties and unresolved issues and their implications

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